Lock.



M. SGHRADER.

LOOK.

APPLIOATION FILED APR. 16, 1909.

Patented Aug. 16, 1910.

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UNITED STATES..,PATENT OFFICE.

MORITZ SGHRADER, OF MOKEESPORT, PENNSYLVANIA, ASSIGNOR OF ONE-THIRD TOI. MOLTZ, 0F MGKEESPORT, PENNSYLVANIA, ONE-THIRD TO H. II. MOLTZ, OFFORD CITY, PENNSYLVANIA, AND ONE-THIRD T0 IKE WOLKEN, OF PITTSBURG,PENN- SYLVANIA.

LOCK.

Specification of Letters Patent.

Patented Aug. 16, 1910.

To all whom it may concern:

Be it known that I, Monrrz SCHRADER, a subject of the Czar of Russia,residing at McKeesport, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inLocks, of which the following is a specification, reference being hadtherein to the accompanying drawing.

This invention relates to looks, and the primary object of the inventionis to provide a lock with a burglar alarm adapted to produce an audiblesignal when the lock is tampered with by burglars or unauthorizedpersons.

Another object of this invention is to provide a burglar alarm that canbe embodied in the present types of locks without interfering with themovement of the latch or look bolt.

The above objects are attained by a novel device that will behereinafter described in detail and claimed, and reference will now behad to the drawing forming a part of this application wherein there isillustrated the preferred embodiments of my invention, but I would haveit understood that the detail construction thereof can be Varied orchanged without departing from the spirit of the invention.

Referring to the drawings :Figure 1 is a vertical sectional view of aportion of a door and frame equipped with improved lock, Fig. 2 is ahorizontal sectional view of the same, Fig. 3 is an edge View of thedoor partly broken away and partly in section, and Fig. 4 is anelevation of a portion of the door illustrating the key hole.

In the accompanying drawings, 1 designates a portion of a door adaptedto be locked in engagement with a frame 2, The frame 2 is provided witha latch socket 3 and a bolt socket 4, also with an angularly disposedexhaust opening 5, said opening be ing in a horizontal plane between thesockets.

3 and 4.

7 designates an escutcheon plate secured to the frame 2 by screws 8 orsimilar fastening means, said plate having openings 9 and 10 registeringwith the sockets 3 and 4 respectively, and also having a sleeve 11projecting into the opening 5. The sleeve 11 is inclosed with a metalliccasing 12 located in the opening 5 and extending to the outer edge ofthe frame, where said casing is closed by a perforated plate 13 suitablyse-- cured to the frame 2.

The door 1 is provided with a mortise 14 which is approximatelyone-third the thickness of the door, and said door at the outer edges ofthe mortise 14 is recessed, as at 15, for a purpose that will presentlyappear.

In the mortise 14 is located a lock casing 16, which is suitablysecured, as at 17, to a lock plate 19, said plate being secured to thedoor 1 over the recesses 15 by screws 20 or similar fastening means. Theplate 19 at each recess 15 is provided with a vertical slot 21 andadapted to engage in the slots 21 are hooks 22 carried by an additionallock plate 23. The plates 19 and 23 are provided with suitable openings24 and 25 for a latch 26 and a bolt 27 located in the casing 16 andadapted to extend through said plates into the sockets of the frame 2.

The latch 26 is of an ordinary form actuated by the shank 28- of a doorknob 29, while the bolt 27 is of a type 0 erated through the medium of akey inserte in the locks.

The lock casing 16 in proximity to the bolt 27 is provided withintersecting key openings 30 and 31, and the door 1 is provided with atransverse opening 32, communicating with the openings 30 and 31, theopening 32 being shaped to provide suffi- Dcient clearance for themovement of a key to enter either one of the openings 30 or 31. Theopening 32 also communicates with key openings 33 formed in face plates34 mounted upon the door 1, the key openings 33 alining with theopenings 30, while the distance between the face plates 34 and the sidesof the lock casing 16 is suflicient to permit of the key beingmanipulated in the opening 32.

The lock bolt 27 is slotted, as at 35, and extending through said slotis a bolt 36 carried by the casing 16, said bolt serving functionally asa pivot pin for a hammer 37. The lower end of the hammer 37 is providedwith a semi-circular recess 38 to receive a trigger 39, said triggerbeing pivotally mounted upon a bolt 40 carried by the casing 16. Thetrigger is provided with two hammer contacting points 41 and with a keycontacting point 42, the former being arranged to engage the hammer 37,while the latter is arranged within the path of the 3 key inserted ineither of the openings 30 or31.

I The upper end of the hammer is provided with a firing pin 43 extendingthrough an ,opening 44 formed in an angle plate 46,

secured to the side of the casing 16. The end of thehammer 37 is alsoengaged by a spring47 arranged within the casing 16 for normally holdingthe upper end of the ham- 1 mer in engagement with the angle plate 46.The plate 19 is provided with a cartridge socket48 for a cartridge 49,said cartridge 5 socket being retained within the plate 19 1 by theplate'23, said plate 23 having a. small opening 50 adapted to aline withthe cartridge' socket and with the sleeve 11 of the plate 7.

Assuming that a suitable key is employed for shifting the bolt 27 themanner of manipulating the lock is as follows: A person familiar withthe operation of the lock inserts the key in one of the openings 33 andturns the same in the opening 32 until the key registers with theopening 31. The key is then pushed inwardly into the casing 16 and. byturning the key to the right, (Fig. 1) the bolt 27 which is shown in alocked or closed position in Fig. l of the drawings, will be unlocked oropened and the key can then be withdrawn from the door through ,theopenings 30 32 and 33. If inserted through openings 33, 32 and 30 andturned to the left (Fig. l) the bolt 27 will be moved to a lockedposition, and the key is with drawn through the opening 31, into theopening 32 and turned in the latter until brought into registry withopening 33 fhrlcgugh which it is withdrawn from the A burglar or personnot familiar with the operation of the lock would naturally in sert thekey. through the openings 33, 32 and 30 and upon turning the key to theleft to shift the bolt 27, the key would contact with the point 42 ofthe trigger 39, and

cause the point 41 of the trigger to swing I thelower end of the hammer37 to the left and the upper end of the hammer to the right, placing thespring 47 under tension. Immediately upon the key releasing the point42, the spring 47 would return the hammer and the trigger to theirnormal position, causing the firing pin of the hammer to strike thecartridge 49 and fire the same, the fumes from said cartridge escapingthrough the opening 50, sleeve 11, casing 12 and perforated plate 13.

The hammer 37 would also be actuated by a person unfamiliar with thelook when locking the door, as'the key turning to the left would contactwith the trigger, unless the key was withdrawn through the opening 31.

By providing the door-frame 2 withan V the cartridge.

Having now described my invention what I claim as new, is

1. In a lock, the combination with a doorframe having an exhaust openingformed therein, a door, and a lock casing located in said door, a lockbolt within said casing for engaging said frame and adapted to bemanipulated by a key, of a cartridge socket carried by said lock casingand adapted to communicate with the exhaust opening of said frame, aspring-pressed hammer pivotally mounted in said casing for firing acartridge located in said socket, and extending across the lock bolt, apivot for the'hammer extending through the lock bolt and upon which thelock bolt is shifted, a trigger pivotally mounted in said casing andseated in one end of and adapted to move said hammer, said triggerhaving a contact point within the path of the key employed for actuatingthe lock bolt, and means in connection with said door and said lockcasing for providing clearance for the key relative to said trigger.

2. In a lock, the combination with a doorframe having an exhaust openingformed therein, a door, and a lock casing located in said door, a lockbolt within said casing for engaging said frame and adapted to bemanipulated by a key, of a cartridge socket carried by said lock casingand adapted to communicate with the exhaust opening of said frame, ahammer pivotally mounted in said casing for firing a cartridge in saidsocket, and extendingacross the lock bolt, a pivot for said hammerextending through the lock bolt and upon which said bolt shifts, and atrigger pivotally mounted in said casing and seated in one end of andadapted to move said hammer and adapted for actuation by the keyemployed for operating said bolt, said door and said lock casing havingopenings formed therein providing clearance for the bolt actuating keyrelative to said trigger.

3. In a lock, the combination with a doorframe having an exhaust openingformed therein, a door, and a lock casing located in said door andhavingva key actuated bolt, of means for supporting a cartridge within'd casing and in communication with the exhaust opening of said frame, ahammer pivotally mounted in said casing for firing a cartridge locatedin said casing and ex tending across the lock bolt, a pivot for saidhammer extending through said bolt and upon which the bolt shifts, and ahammer operating trigger adapted for actuation by through the bolt andupon which the bolt shifts, and a trigger seated in one end of thehammer and adapted to be actuated by the 15 key employed for moving saidbolt.

In testimony whereof I affix my signature in the presence of tWowitnesses.

hi MORITZ XZSCHRADER.

mar lVitnesses CLYDE N. SHAW, LAURA E. FERREE.

